It's time for your weekly fix of entrepreneurial ideas! I really like the "retrofit idea", I saw a VW Thing the other day on the road, and thought to myself it would be good retrofit auto -- you could easily utilize as an elecric car [and it didn't have lots of 'power' accessories either]. The latest Springwise newsletter is now online. Here's a quick run-down of the business concepts featured in this edition:

Converting standard Corollas into electric carsAutomotive / Eco & sustainabilitySähköautot–Nyt! is taking an innovative approach to getting more electric-powered vehicles on the road. Instead of building a new model from scratch, they'll retro-fit existing Toyota Corollas.

More cosmetics tryvertising by mailMarketing & advertising / Fashion & beauty Last year we wrote about a program through which women can sign up to receive beauty product samples to test out at home each month. A new, similar concept gives consumers even more choice.

Boosting suburban farmingEco & sustainability / Homes & housing / Food & beverage Australian Permablitz is a group that focuses on bringing sustainable, edible gardens to the suburban neighbourhoods around Melbourne, using team effort to speed up the process.

Book publisher for kidsMedia & publishing We've already written about companies that serve as book publishers for the masses, and now Tikatok has launched into beta a new service that brings the same opportunity to kids.

Import/export intelligence serviceMarketing & advertisingImporters, manufacturers and retailers can benefit from an easy way to keep tabs on the shipping and receiving activities of their competitors and suppliers. Two new services offer instant access in real time.

Platform for healthcare 2.0Lifestyle & leisure Jay Parkinson MD has teamed up with Myca, a Canadian provider of health technology, to develop Hello Health, a technology platform that's designed to open intelligent channels between patients and doctors.